There was a seller on eBay that had 3 or 4 of those Conker posters, but he's all sold out now. I took his last poster and ended up paying twice what he sold the other ones for, simply because it was his last one.
He actually had a buttload of unique and awesome posters. This is the only one I got from him though, as I was a little short on cash then. He had a couple of Kameo posters, which I would've killed to have. I hadn't seen any Kameo posters before.